linux-kernel - Re: [PATCH v8 2/5] ipc: IPCMNI limit check for semmni

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Message-ID: <d0596d73-1130-3ee5-a8ee-b8a9e8989d45@redhat.com>
Date:   Fri, 29 Jun 2018 15:26:23 +0800
From:   Waiman Long <longman@...hat.com>
To:     "Luis R. Rodriguez" <mcgrof@...nel.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
        Al Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Takashi Iwai <tiwai@...e.de>, Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH v8 2/5] ipc: IPCMNI limit check for semmni

On 06/29/2018 06:39 AM, Luis R. Rodriguez wrote:
> On Mon, Jun 18, 2018 at 06:28:15PM +0800, Waiman Long wrote:
>> For SysV semaphores, the semmni value is the last part of the 4-element
>> sem number array. To make semmni behave in a similar way to msgmni and
>> shmmni, we can't directly use the _minmax handler. Instead, a special
>> sem specific handler is added to check the last argument to make sure
>> that it is limited to the [0, IPCMNI] range. An error will be returned
>> if this is not the case.
> Sorry my time has run out, and will be on vacation until July 10th. If
> this can wait until then then great, otherwise hopefully Kees can take
> a look. It would be wonderful to get Eric's review on this as well.
>
>   Luis

Thanks for the review. I will try to get other reviewer to chime in.

Kees and Eric, do you have comments on this patchset?

Cheers,
Longman